diff --git a/PveTeam.Math/Vector3D.cs b/PveTeam.Math/Vector3D.cs
index 51004a0..b125e5a 100644
--- a/PveTeam.Math/Vector3D.cs
+++ b/PveTeam.Math/Vector3D.cs
@@ -5,7 +5,7 @@ using System.Text;
 
 namespace PveTeam.Mathematics
 {
-    public struct Vector3D : IEquatable<Vector3>, IFormattable
+    public struct Vector3D : IEquatable<Vector3D>, IFormattable
     {
         public Double X, Y, Z;
 
@@ -206,12 +206,12 @@ namespace PveTeam.Mathematics
 
         public override bool Equals(object obj)
         {
-            if (!(obj is Vector3))
+            if (!(obj is Vector3D))
                 return false;
-            return Equals((Vector3)obj);
+            return Equals((Vector3D)obj);
         }
 
-        public bool Equals(Vector3 other)
+        public bool Equals(Vector3D other)
             => X == other.X && Y == other.Y && Z == other.Z;
         #endregion
 
diff --git a/PveTeam.Math/Vector3I.cs b/PveTeam.Math/Vector3I.cs
index 6e5e820..23495e4 100644
--- a/PveTeam.Math/Vector3I.cs
+++ b/PveTeam.Math/Vector3I.cs
@@ -1,9 +1,141 @@
 using System;
+using System.Globalization;
+using System.Numerics;
+using System.Text;
 
 namespace PveTeam.Mathematics
 {
-    public struct Vector3I
+    public struct Vector3I : IEquatable<Vector3I>, IFormattable
     {
         public Int32 X, Y, Z;
+
+        #region Static fields
+        public static Vector3I Zero => new Vector3I(0);
+        public static Vector3I One => new Vector3I(1);
+        public static Vector3I UnitX => new Vector3I(1, 0, 0);
+        public static Vector3I UnitY => new Vector3I(0, 1, 0);
+        public static Vector3I UnitZ => new Vector3I(0, 0, 1);
+        #endregion
+
+        #region Constructors
+        public Vector3I(Int32 value) : this(value, value, value) { }
+
+        public Vector3I(Vector3 value) : this((Int32)value.X, (Int32)value.Y, (Int32)value.Z) { }
+
+        public Vector3I(Single x, Single y, Single z) : this((Int32)x, (Int32)y, (Int32)z) { }
+
+        public Vector3I(Vector3D value) : this((Int32)value.X, (Int32)value.Y, (Int32)value.Z) { }
+
+        public Vector3I(Int32 x, Int32 y, Int32 z)
+        {
+            X = x;
+            Y = y;
+            Z = z;
+        }
+        #endregion
+
+        #region Instance methods
+        public readonly Single Length()
+            => MathF.Sqrt(LengthSquared());
+
+        public readonly Single LengthSquared()
+            => X * X + Y * Y + Z * Z;
+        #endregion
+
+        #region Static methods
+
+        public static Single Distance(Vector3I value1, Vector3I value2)
+            => (value1 - value2).Length();
+
+        public static Single DistanceSquared(Vector3I value1, Vector3I value2)
+            => (value1 - value2).LengthSquared();
+
+        public static Vector3I Normalize(Vector3I value)
+            => value / value.Length();
+        #endregion
+
+        #region Operators
+        public static Vector3I operator +(Vector3I left, Vector3I right)
+            => new Vector3I(left.X + right.X, left.Y + right.Y, left.Z + right.Z);
+        public static Vector3I operator -(Vector3I left, Vector3I right)
+            => new Vector3I(left.X - right.X, left.Y - right.Y, left.Z - right.Z);
+        public static Vector3I operator *(Vector3I left, Vector3I right)
+            => new Vector3I(left.X * right.X, left.Y * right.Y, left.Z * right.Z);
+        public static Vector3I operator *(Vector3I left, Single right)
+            => left * new Vector3I((int)right);
+        public static Vector3I operator *(Single left, Vector3I right)
+            => new Vector3I((int)left) * right;
+        public static Vector3I operator /(Vector3I left, Vector3I right)
+            => new Vector3I(left.X / right.X, left.Y / right.Y, left.Z / right.Z);
+        public static Vector3I operator /(Vector3I left, Single right)
+        {
+            Single invert = 1.0f / right;
+            return new Vector3I(left.X * invert, left.Y * invert, left.Z * invert);
+        }
+        public static Vector3I operator -(Vector3I value)
+            => Zero - value;
+        public static bool operator ==(Vector3I left, Vector3I right)
+            => left.X == right.X && left.Y == right.Y && left.Z == right.Z;
+        public static bool operator !=(Vector3I left, Vector3I right)
+            => left.X != right.X || left.Y != right.Y || left.Z != right.Z;
+
+        #endregion
+
+        #region Operator methods
+        public static Vector3I Add(Vector3I left, Vector3I right)
+            => left + right;
+        public static Vector3I Subtract(Vector3I left, Vector3I right)
+            => left - right;
+        public static Vector3I Multiply(Vector3I left, Vector3I right)
+            => left * right;
+        public static Vector3I Multiply(Vector3I left, int right)
+            => left * right;
+        public static Vector3I Multiply(int left, Vector3I right)
+            => left * right;
+        public static Vector3I Divide(Vector3I left, Vector3I right)
+            => left / right;
+        public static Vector3I Divide(Vector3I left, int right)
+            => left / right;
+        #endregion
+
+        #region Equals
+
+        public override int GetHashCode()
+            => X.GetHashCode() ^ Y.GetHashCode() << 2 ^ Z.GetHashCode() >> 2;
+
+        public override bool Equals(object obj)
+        {
+            if (!(obj is Vector3I))
+                return false;
+            return Equals((Vector3I)obj);
+        }
+
+        public bool Equals(Vector3I other)
+            => X == other.X && Y == other.Y && Z == other.Z;
+        #endregion
+
+        #region Formatting
+        public string ToString(string format, IFormatProvider formatProvider)
+        {
+            StringBuilder sb = new StringBuilder();
+            string separator = NumberFormatInfo.GetInstance(formatProvider).NumberGroupSeparator;
+            sb.Append('<');
+            sb.Append(((IFormattable)this.X).ToString(format, formatProvider));
+            sb.Append(separator);
+            sb.Append(' ');
+            sb.Append(((IFormattable)this.Y).ToString(format, formatProvider));
+            sb.Append(separator);
+            sb.Append(' ');
+            sb.Append(((IFormattable)this.Z).ToString(format, formatProvider));
+            sb.Append('>');
+            return sb.ToString();
+        }
+
+        public override string ToString()
+            => ToString("G", CultureInfo.CurrentCulture);
+
+        public string ToString(string format)
+            => ToString(format, CultureInfo.CurrentCulture);
+        #endregion
     }
 }